What airlines fly to Lisbon?

American Airlines, United Airlines and British Airways are the top three most popular airlines that fly to Lisbon from Knoxville according to our data. American Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Lisbon. Keep in mind that there are 4 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from Knoxville to Lisbon?

Flights connecting via Washington, D.C. (IAD) have the shortest average one-way travel time: 9h 52m.

Which airport is the most popular layover for flights between Knoxville and Lisbon?

Philadelphia (PHL) was the most common stop: 55% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Knoxville to Lisbon?

Washington, D.C. (IAD) has the shortest average layover time for this route: 1h 37m.

Which layover airport offers the lowest fares from Knoxville to Lisbon?

Flights via Washington, D.C. (IAD) offer the lowest average round-trip price of $554.

When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

Prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport are updated daily.

How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

As of December 2025, there are 3 operators available to choose from for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport.

How old do you have to be to fly from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport.

What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

The required travel and health documents for your Lisbon Humberto Delgado Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lisbon Humberto Delgado Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$493 Cheap Flights from Knoxville to Lisbon in 2025/26

Q: What is the typical price of a round-trip flight between Knoxville and Lisbon?

Prices are currently low for flights on this route. Typical prices usually range from $607 to $1,891. The lowest price recently found on this route was $493.

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Find the cheapest flights from Knoxville to Lisbon

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Cheap round-trip flights

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11:40 am - 9:20 am

TYS

LIS

40h 40m2 stops

11:20 am - 7:27 pm

LIS

TYS

37h 07m2 stops

$493United Airlines

Wed, Jan 7 - Fri, Jan 16

11:07 am - 8:10 am

TYS

LIS

16h 03m2 stops

11:20 am - 2:49 pm

LIS

TYS

32h 29m2 stops

$494United Airlines

Thu, Jan 8 - Mon, Jan 19

1:59 pm - 9:20 am

TYS

LIS

14h 21m2 stops

11:20 am - 2:49 pm

LIS

TYS

32h 29m2 stops

$496Air Canada

Fri, Jan 9 - Mon, Jan 19

9:05 am - 9:20 am

TYS

LIS

19h 15m2 stops

5:00 am - 8:52 pm

LIS

TYS

20h 52m2 stops

$497United Airlines

Thu, Jan 8 - Fri, Jan 16

11:07 am - 8:10 am

TYS

LIS

16h 03m2 stops

5:00 am - 8:52 pm

LIS

TYS

20h 52m2 stops

$498United Airlines

Thu, Jan 8 - Thu, Jan 15

6:59 am - 8:55 am

TYS

LIS

20h 56m2 stops

6:10 am - 7:27 pm

LIS

TYS

18h 17m2 stops

$499United Airlines

Sat, Jan 10 - Sat, Jan 17

1:59 pm - 9:20 am

TYS

LIS

14h 21m2 stops

5:00 am - 8:52 pm

LIS

TYS

20h 52m2 stops

$500United Airlines

Fri, Jan 9 - Thu, Jan 15

7:20 pm - 9:20 am

TYS

LIS

33h 00m2 stops

6:10 am - 7:27 pm

LIS

TYS

18h 17m2 stops

$504Multiple Airlines

Wed, Jan 7 - Sat, Jan 17

7:44 am - 6:55 am

TYS

LIS

18h 11m1 stop

11:05 am - 8:56 pm

LIS

TYS

14h 51m1 stop

$506Multiple Airlines

Wed, Jan 7 - Fri, Jan 16

6:40 am - 9:50 pm

TYS

LIS

34h 10m2 stops

6:40 pm - 9:05 pm

LIS

TYS

30h 25m2 stops

$507British Airways

Wed, Mar 4 - Sun, Mar 15

United Airlines flights from Knoxville to Lisbon

Our best United Airlines deals on Knoxville to Lisbon flight tickets

United Airlines

Jan 7

TYS11:40 amKnoxville McGhee Tyson

40h 40m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jan 16

LIS11:20 amLisbon Humberto Delgado

37h 07m

2 stops

TYS7:27 pmKnoxville McGhee Tyson

$493

Find similar

United Airlines

Jan 8

TYS11:07 amKnoxville McGhee Tyson

16h 03m

2 stops

LIS8:10 amLisbon Humberto Delgado

Jan 19

LIS11:20 amLisbon Humberto Delgado

32h 29m

2 stops

TYS2:49 pmKnoxville McGhee Tyson

$494

Find similar

United Airlines

Jan 8

TYS9:05 amKnoxville McGhee Tyson

19h 15m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jan 16

LIS5:00 amLisbon Humberto Delgado

20h 52m

2 stops

TYS8:52 pmKnoxville McGhee Tyson

$497

Find similar

Air Canada flights from Knoxville to Lisbon

Our best Air Canada deals on Knoxville to Lisbon flight tickets

Air Canada

Jan 9

TYS1:59 pmKnoxville McGhee Tyson

14h 21m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jan 19

LIS11:20 amLisbon Humberto Delgado

32h 29m

2 stops

TYS2:49 pmKnoxville McGhee Tyson

$496

Find similar

Air Canada

Jan 7

TYS7:20 pmKnoxville McGhee Tyson

33h 00m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jan 17

LIS11:20 amLisbon Humberto Delgado

28h 37m

2 stops

TYS10:57 amKnoxville McGhee Tyson

$512

Find similar

Air Canada

Jan 9

TYS9:30 amKnoxville McGhee Tyson

18h 50m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jan 17

LIS11:20 amLisbon Humberto Delgado

28h 37m

2 stops

TYS10:57 amKnoxville McGhee Tyson

$516

Find similar

Fly from

Fly to

Route

Depart

Return

Price

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

11:40 am-9:20 am

2 stops40h 40m

Lisbon Humberto Delgado

Fri 1/16

11:20 am-7:27 pm

2 stops37h 07m

$493

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 1/8

11:07 am-8:10 am

2 stops16h 03m

Lisbon Humberto Delgado

Mon 1/19

11:20 am-2:49 pm

2 stops32h 29m

$494

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 1/9

1:59 pm-9:20 am

2 stops14h 21m

Lisbon Humberto Delgado

Mon 1/19

11:20 am-2:49 pm

2 stops32h 29m

$496

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 1/8

9:05 am-9:20 am

2 stops19h 15m

Lisbon Humberto Delgado

Fri 1/16

5:00 am-8:52 pm

2 stops20h 52m

$497

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 1/8

11:07 am-8:10 am

2 stops16h 03m

Lisbon Humberto Delgado

Thu 1/15

5:00 am-8:52 pm

2 stops20h 52m

$498

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 1/10

6:59 am-8:55 am

2 stops20h 56m

Lisbon Humberto Delgado

Sat 1/17

6:10 am-7:27 pm

2 stops18h 17m

$499

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 1/9

1:59 pm-9:20 am

2 stops14h 21m

Lisbon Humberto Delgado

Thu 1/15

5:00 am-8:52 pm

2 stops20h 52m

$500

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

7:20 pm-9:20 am

2 stops33h 00m

Lisbon Humberto Delgado

Sat 1/17

6:10 am-7:27 pm

2 stops18h 17m

$504

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

7:44 am-6:55 am

1 stop18h 11m

Lisbon Humberto Delgado

Fri 1/16

11:05 am-8:56 pm

1 stop14h 51m

$506

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 3/4

6:40 am-9:50 pm

2 stops34h 10m

Lisbon Humberto Delgado

Sun 3/15

6:40 pm-9:05 pm

2 stops30h 25m

$507

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Knoxville to Lisbon

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Knoxville and Lisbon?

What is the cheapest month to fly to Lisbon?

In general, February is the cheapest month to fly from Knoxville to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $638. If you are unable to visit Lisbon during the month of February, then departing from Knoxville during the month January is also very affordable. Most momondo users find prices during this month for around $683.

What is the cheapest day to depart on your flight to Lisbon?

Our data shows that Monday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $819. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to Lisbon for around $1,534.

What is the cheapest time of day to depart on your flight to Lisbon?

The cheapest time of day to fly to Lisbon is in the morning when flights can be purchased for as low as $745. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,134 on average. Flights to Lisbon from Knoxville in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Can stopping save me money on Knoxville to Lisbon flights?

You could potentially save up to 11% on your flight if you consider stops on a Knoxville to Lisbon flight.

When to book flights from Knoxville to Lisbon

Are you open to changing your travel dates? Check out the ideal times to fly from Knoxville to Lisbon according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Knoxville to Lisbon (TYS to LIS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Lisbon

Fastest flight time	9h 38m
Direct flights	None

The fastest flight from Knoxville to Lisbon takes 9h 38m

There are no direct flights from Knoxville to Lisbon. There are no popular flight routes from Knoxville to Lisbon.

Search flight deals

How far is Knoxville McGhee Tyson to Lisbon Humberto Delgado by plane?
Lisbon Humberto Delgado is 3990.0 mi away from Knoxville McGhee Tyson. 9h 38m is a normal flight duration for this route.
When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?
Prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport are updated daily.
How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?
As of December 2025, there are 3 operators available to choose from for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport.
How old do you have to be to fly from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport.
What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?
The required travel and health documents for your Lisbon Humberto Delgado Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lisbon Humberto Delgado Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Knoxville to Lisbon?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Knoxville to Lisbon is United Airlines (43% of total bookings). The next most popular airlines are British Airways (34%) and American Airlines (23%).

Best airlines flying from Knoxville to Lisbon

Compare and see reviews for airlines that fly from Knoxville to Lisbon with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $564	Free Cancellation	Rating 6.7 7,571 reviews	Search British Airways flights
American Airlines	PriceFrom $602	Free Cancellation	Rating 7.2 11,048 reviews	Search American Airlines flights
United Airlines	PriceFrom $633	Free Cancellation	Rating 7.4 9,095 reviews	Search United Airlines flights

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Peniche

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Leiria

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Almada

Evora

Figueira da Foz

Zambujeira do Mar

Batalha

Comporta

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Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Lisbon?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Knoxville to Lisbon. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Knoxville to Lisbon with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Knoxville to Lisbon flights to just show those with flexible booking policies.

How can momondo help me find flights from Knoxville to Lisbon?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Lisbon from Knoxville.

I’m not ready to book a flight from Knoxville to Lisbon right now. Can momondo alert me if prices change?

Price alerts on flights to Lisbon from Knoxville are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Lisbon trip

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Cheap flights from Knoxville to Lisbon from $493

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Lisbon departing on 1/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Knoxville to Lisbon

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How to get the cheapest flight ticket from Knoxville to Lisbon

What is the typical price of a round-trip flight between Knoxville and Lisbon?

What is the cheapest month to fly to Lisbon?

What is the cheapest day to depart on your flight to Lisbon?

Our data shows that Monday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $819. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to Lisbon for around $1,534.

What is the cheapest time of day to depart on your flight to Lisbon?

Can stopping save me money on Knoxville to Lisbon flights?

You could potentially save up to 11% on your flight if you consider stops on a Knoxville to Lisbon flight.

What airlines fly to Lisbon?

Which airport is the most popular layover for flights between Knoxville and Lisbon?

Philadelphia (PHL) was the most common stop: 55% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Knoxville to Lisbon?

Flights via Washington, D.C. (IAD) offer the lowest average round-trip price of $554.

Which layover airport has the shortest travel time from Knoxville to Lisbon?

Flights connecting via Washington, D.C. (IAD) have the shortest average one-way travel time: 9h 52m.

Which layover airport has the shortest connection time from Knoxville to Lisbon?

Washington, D.C. (IAD) has the shortest average layover time for this route: 1h 37m.

When to book flights from Knoxville to Lisbon

Cheap Knoxville to Lisbon (TYS to LIS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Lisbon

Fastest flight time

Direct flights

How far is Knoxville McGhee Tyson to Lisbon Humberto Delgado by plane?

When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

How old do you have to be to fly from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

What is the most popular airline from Knoxville to Lisbon?

Best airlines flying from Knoxville to Lisbon

Compare and see reviews for airlines that fly from Knoxville to Lisbon with momondo

Traveling to a place near Lisbon?

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Lisbon?

Can I find flights from Knoxville to Lisbon with flexible booking policies on momondo?

How can momondo help me find flights from Knoxville to Lisbon?

I’m not ready to book a flight from Knoxville to Lisbon right now. Can momondo alert me if prices change?

An easier way to manage your Lisbon trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Airports servicing Portugal